The National Interest on MSN

Why America built only one plane out of titanium

Titanium is fantastically expensive, and difficult to fabricate, relative to other materials—meaning it was only ever ...
Found and Explained Official on MSN

When the CIA built a stealth drone in the 1960s

After the U-2 shootdown, the CIA and Lockheed developed the D-21, a pilotless Mach 3 reconnaissance drone launched from ...